[chewzerita]

From my limited knowledge (basically 0) of supply chains, I disagree. (Though I am neutral on the statement "you can't really trust any part of it.")

The anecdote I heard was that say you have a blockchain to keep track of your goods shipping on trucks. When the trucks leave and enter a facility their payload is entered into the blockchain. The idea is that it will make sure that every party along the supply chain can say "well I got the next person what they needed" so you can easily put blame on and correct for missing/failing items.

Sounds good, right? Well, not so fast. It turns out that some of the items were stolen from a truck (whether by an employee or otherwise). The truck arrives at the next facility, scans in and certifies that they have the proper items and none are the wiser!

Hold on, can't they just physically check at each stop to actually make sure that they have the right cargo?

Bingo! At that point, what problem does the blockchain actually solve? Blockchain works okay-ish for digital goods (cryptocurrency), but completely falls apart for physical goods.